Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1121-1140 of 11352
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Degradasi Fotokimia Karet Alam sebagai Compatibilizer Campuran Aspal
(Universitas Sumatera Utara, 2023)The degradation of natural rubber (NR) molecular chains to produce degraded natural rubber (NRd) using photochemical methods has been successfully carried out. The degradation process was carried out using a 30-watt UV ... -
Pengaruh Konsentrasi Naoh terhadap Kapasitas Adsorbsi Ion Logam Berat pada Sintesis Magnesium Ferrite sebagai Adsorben
(Universitas Sumatera Utara, 2023)MgFe2O4 has been successfully synthesized using the co-precipitation method. The synthesis of this material was prepared by mixing MgCl2.6H2O, iron sand, HCl, and varying concentrations of NaOH, namely 5M (K1), 10M (K2), ... -
Karakterisasi Komposit Polimer Konduktif Berbasis Pati Jagung dan Karet Alam dengan Variasi Karbon Konduktif
(Universitas Sumatera Utara, 2023)Conductive polymer composites have been successfully synthesized through the crosslinking method and their conductivity properties have been analyzed. Corn starch and natural rubber which are non-conductive natural polymers ... -
Jamur Pemerangkap Nematoda Asal Lau Kawar sebagai Agen Biokontrol Meloidogyne hapla pada Tanaman Tomat (Solanum lycopersicum L.)
(Universitas Sumatera Utara, 2023)Root knot nematode is one of parasitic caused by nematodes on plants that can cause losses in agricultural product. The parasite is one of the obstacles in increasing of tomato plants (Solanum lycopersicum L.). One of ... -
Sintesis Nitrogen-Doped Carbon Dots Menggunakan Metode Solvotermal dari Kulit Jengkol sebagai Pendeteksi Ion Hg2+
(Universitas Sumatera Utara, 2023)Nitrogen Doped-Carbon dots are fluorescent nanoparticles that are easily synthesized from natural raw materials. Jengkol peel is a biomass waste containing phytochemical compounds that can be used as a precursor to synthesize ... -
Sintesis Hidrogel Komposit Menggunakan Lignin H2SO4 Di-Isolasi dari Kulit Ari Kopi sebagai Adsorben Methylene Blue
(Universitas Sumatera Utara, 2023)The synthesis of hydrogel composite based on kulit ari kopi has been carried out by crosslinking method. The method applied by the addition of lignin H2SO4 isolated from kulit ari kopi was 0.05%, 0.1%, 0.2%, 0.3%, the ... -
Studi Karakterisasi Variasi Fraksi Volume Serat Kelapa Sawit sebagai Material Komposit
(Universitas Sumatera Utara, 2023)Composites based on polyester matrix and palm oil fly ash fillers have been successfully prepared using simple techniques. Palm fiber reinforcement is used to determine the level of its influence on physical properties ... -
Potensi Jamur Endofit Tanaman Serai (Cymbopogon nardus ) sebagai Penghasil Senyawa Antibakteri
(Universitas Sumatera Utara, 2023)Endophytic fungi are a group of functional microorganisms from plants that can be used as a sustainable source to produce bioactive metabolites including pharmaceuticals. Citronella grass (Cymbopogon nardus) is a kind of ... -
Potensi Sinbiotik Makanan Tradisional sebagai Immunostimulan pada Mencit Putih (Mus musculus)
(Universitas Sumatera Utara, 2023)Traditional food consisting of palm juice, dadih and tempoyak has a higher nutritional value compared to the original ingredients. The starter that is often used in the manufacture of these fermented products is Lactic ... -
Isolasi dan Profil Volatile Organic Compounds (VOC) oleh Kapang Endofit Asal Pneumatofor Avicennia alba
(Universitas Sumatera Utara, 2023)Mangrove forests and their vegetation are important ecosystems for the protection of terrestrial habitats in coastal areas, with high inputs of C and N sources. The mangrove ecosystem is a hotspot for biodiversity, especially ... -
Model Pendekatan Fuzzy pada Hub Location Problem di Jaringan Telekomunikasi
(Universitas Sumatera Utara, 2020)The importance of telecommunications networks has increased over the past few years. Application of Hub Location Problems (HLP) in the field of telecom- munications is more specific in determining the location of hubs ... -
Model Optimisasi untuk Permasalahan Rute Kendaraan dengan Adanya Penjadwalan
(Universitas Sumatera Utara, 2020)Vehicle Routing Problem (VRP) is one of the important issues in the logis- tics system. The VRP problem is a combinatorial optimization problem that is covered by the NP (Hard Problem) NP problem. The scheduling factor ... -
Marchantiophyta di Kawasan Hutan Batang Toru Blok Barat Sumatera Utara
(Universitas Sumatera Utara, 2023)Mosses are a group of low plants and a part of biodiversity that has not received much attention. One area of North Sumatra that has never been reported on liverwort data is from the West Block Batang Toru Forest. This ... -
Model Persoalan Terintegrasi Distribusi
(Universitas Sumatera Utara, 2018)This paper studies about distribution planning of integrated production in structure of the ceritain supply chain. The programming of lnteger Linier Mixed Model to minimize the obstackle of taking decision in planning ... -
Pemodelan Optimisasi Persoalan Perencanaan Green Supply Chain Produk Seafood Multi Eselon
(Universitas Sumatera Utara, 2018)The research aims to build a Green Supply chain planning model of wet fish products in multi-plant, and multi Echelon, to achieve minimum cost by considering products that have shelf-life, considering the availability ... -
Pembuatan dan Karakterisasi Aerogel Nanoserat Selulosa yang Diisolasi dari Pelepah Aren sebagai Adsorben Minyak
(Universitas Sumatera Utara, 2023)This study aims to produce cellulose nanofibers with appropriate size for material technology applications synthesized from sugar palm fibers. Ultrasonication using an ultrasonic homogenizer is used to produce cellulose ... -
Pembuatan Nanoserat Selulosa Aerogel dengan Pengisi Fe3O4@SiO2 Sebagai Adsorben Minyak
(Universitas Sumatera Utara, 2023)In this research, aerogel cellulose nanofibers have been successfully synthesized using TEMPO oxidation with Fe3O4@SiO2 as filler through a freeze-drying process. Composite aerogels were synthesized with variations in the ... -
Pemanfaatan Pati Talas Beneng (Xantoshoma Undipes K. Koch) Pada Pembuatan Plastik Biodegradable dengan Plasticizer Gliserol dan Karakterisasinya
(Universitas Sumatera Utara, 2023)Study has been conducted on Biodegradable plastic made from talas beneng starch (Xantoshoma Undipes K. Koch) and chitosan with glycerol plasticizer using ratio of starch and chitosan with variations of 30%:70%; 40%:60%; ... -
Transisi Fase Order-Disorder pada Model Dinamika Opini q-Voter
(Universitas Sumatera Utara, 2023)This study examines the opinion dynamics of the q-voter model in the presence of a noise parameter. The q-voter model is one of the well-known opinion dynamics models in Sociophysics, namely a model that describes the rules ... -
Pemanfaatan Serbuk Jati Belanda dan Bentonit Sebagai Material Keramik
(Universitas Sumatera Utara, 2023)In this research, solid-state reaction method was used to fabricate ceramic materials based on Belanda Teak wood powder and Bentonite. Sample activated at 1000 ℃. It is mixed for 30 minutes at 500 rpm using a ball milling. ...